Boston Police Officer Carlos Martinez, the beat cop assigned to Egleston Square, is well known around the neighborhood. The officer won recognition this week from the city's top cop for his role in apprehending a man accused of squeezing off gunshots from a car. Martinez witnessed someone firing from a vehicle near Ernst and Bragdon last Saturday, according to a post on the Boston Police Department's blog. Martinez gave chase and, with the help of other units, made an arrest. During the chase, a loaded gun and pair of gloves, later recovered, were chucked from the car.